Hi all, I am interested which individual letter Lancaster ME571 wore around 20.4.1944?

According to this page: http://www.adf-serials.com.au/lancaster.htm
ME571 Mk. I 463 Sqn. 15/02/44 to 21/05/44, JO-W.

but http://www.lancaster-archive.com/lan...crashsites.pdf
suggests:
ME571 463 Sqn, RAAF del'd 4-2-44 JO-P, JO-T, JO-W

Any help much appreciated

TIA

Pavel